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diff --git a/test/java/util/Collections/CheckedMapBash.java b/test/java/util/Collections/CheckedMapBash.java
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+/*
+ * Copyright 2003-2004 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ * @test
+ * @bug     4904067 5023830
+ * @summary Unit test for Collections.checkedMap
+ * @author  Josh Bloch
+ */
+
+import java.util.*;
+
+public class CheckedMapBash {
+    static Random rnd = new Random();
+    static Object nil = new Integer(0);
+
+    public static void main(String[] args) {
+        int numItr = 100;
+        int mapSize = 100;
+
+        // Linked List test
+        for (int i=0; i<numItr; i++) {
+            Map m = newMap();
+            Object head = nil;
+
+            for (int j=0; j<mapSize; j++) {
+                Object newHead;
+                do {
+                    newHead = new Integer(rnd.nextInt());
+                } while (m.containsKey(newHead));
+                m.put(newHead, head);
+                head = newHead;
+            }
+            if (m.size() != mapSize)
+                fail("Size not as expected.");
+
+            {
+                HashMap hm = new HashMap(m);
+                if (! (hm.hashCode() == m.hashCode() &&
+                       hm.entrySet().hashCode() == m.entrySet().hashCode() &&
+                       hm.keySet().hashCode() == m.keySet().hashCode()))
+                    fail("Incorrect hashCode computation.");
+
+                if (! (hm.equals(m) &&
+                       hm.entrySet().equals(m.entrySet()) &&
+                       hm.keySet().equals(m.keySet()) &&
+                       m.equals(hm) &&
+                       m.entrySet().equals(hm.entrySet()) &&
+                       m.keySet().equals(hm.keySet())))
+                    fail("Incorrect equals computation.");
+            }
+
+            Map m2 = newMap(); m2.putAll(m);
+            m2.values().removeAll(m.keySet());
+            if (m2.size()!= 1 || !m2.containsValue(nil))
+                fail("Collection views test failed.");
+
+            int j=0;
+            while (head != nil) {
+                if (!m.containsKey(head))
+                    fail("Linked list doesn't contain a link.");
+                Object newHead = m.get(head);
+                if (newHead == null)
+                    fail("Could not retrieve a link.");
+                m.remove(head);
+                head = newHead;
+                j++;
+            }
+            if (!m.isEmpty())
+                fail("Map nonempty after removing all links.");
+            if (j != mapSize)
+                fail("Linked list size not as expected.");
+        }
+
+        Map m = newMap();
+        for (int i=0; i<mapSize; i++)
+            if (m.put(new Integer(i), new Integer(2*i)) != null)
+                fail("put returns a non-null value erroenously.");
+        for (int i=0; i<2*mapSize; i++)
+            if (m.containsValue(new Integer(i)) != (i%2==0))
+                fail("contains value "+i);
+        if (m.put(nil, nil) == null)
+            fail("put returns a null value erroenously.");
+        Map m2 = newMap(); m2.putAll(m);
+        if (!m.equals(m2))
+            fail("Clone not equal to original. (1)");
+        if (!m2.equals(m))
+            fail("Clone not equal to original. (2)");
+        Set s = m.entrySet(), s2 = m2.entrySet();
+        if (!s.equals(s2))
+            fail("Clone not equal to original. (3)");
+        if (!s2.equals(s))
+            fail("Clone not equal to original. (4)");
+        if (!s.containsAll(s2))
+            fail("Original doesn't contain clone!");
+        if (!s2.containsAll(s))
+            fail("Clone doesn't contain original!");
+
+        s2.removeAll(s);
+        if (!m2.isEmpty())
+            fail("entrySet().removeAll failed.");
+
+        m2.putAll(m);
+        m2.clear();
+        if (!m2.isEmpty())
+            fail("clear failed.");
+
+        Iterator i = m.entrySet().iterator();
+        while(i.hasNext()) {
+            i.next();
+            i.remove();
+        }
+        if (!m.isEmpty())
+            fail("Iterator.remove() failed");
+    }
+
+    static Map newMap() {
+        Map m = Collections.checkedMap(new HashMap(),
+                                       Integer.class, Integer.class);
+
+        if (!m.isEmpty())
+            fail("New instance non empty.");
+        return m;
+    }
+
+    static void fail(String s) {
+        throw new RuntimeException(s);
+    }
+}